A pool that's used most of the year and could use a chill option in late summer, with steady, low-cost heat the rest of the time.
★★★★★ 230+ Google Reviews · CPO C-105377 · 40+ years of combined founder experience
Sizing comes first.The right heater is set by your pool's surface area and the temperature rise you want, and by the flow your pump and plumbing deliver. Start with the heater size calculator; we confirm it on site before quoting.
Our own score for what saves you money and headaches in South Florida.
TWPH-8550EHC08
4.2
out of 5
From the manufacturer's documents listed under Sources. Where the documents disagree, the table says so.
| Manufacturer model number | TWPH-8550EHC08 (EHT models are heat only; 4550, 5550 and 6550 are the smaller sizes) |
|---|---|
| Heating capacity | 137,000 BTU/hr at 80°F air / 80°F water / 80% RH |
| COP | 5.8 at 80/80/80; 5.7 at 80/63/80; 4.1 at the AHRI low test point (50/63/80). Tested to AHRI 1160. |
| Capacity at the low test point | 85,000 BTU/hr at 50°F air / 63% RH / 80°F water |
| Heat or heat and cool | Heat and chill; a bypass assembly is included on heat/cool models |
| Heat exchanger | Titanium tube, rated 600 psig |
| Refrigerant | R-410A |
| Cabinet and discharge | Powder-coated metal cabinet, up-flow (vertical) air discharge, front controls |
| Electrical | 208-230 VAC, 1 phase, 60 Hz; 6.7 kW input |
| Minimum recommended amps | 46 A |
| Recommended breaker | 60 A |
| Water connections | 2" PVC unions; 120°F maximum water temperature |
| Water flow | 20 GPM minimum recommended; 60 GPM maximum per Raypak's product page; external bypass required above 50 GPM. Raypak's own documents conflict on the maximum: the Crosswind V product submittal (100-10009566 Rev 01) prints "25 GPM maximum water flow" under the heat exchanger while the product page prints 60 GPM. We publish the product-page figure and flag the conflict — have the installer confirm the flow limit with Raypak before setting variable-speed pump speeds. |
| Sound level | 64 dBA |
| Clearances | 5 ft above the unit, 12" each side, 3 ft in front; outdoor installation only |
| Outside lockout temperature | Factory set to 45°F, adjustable from the service menu |
| Dimensions and weight | 37.78" H x 33.79" W x 33.79" D; 340 lbs |
| Maximum pool size | 27,101 gallons per California Title 24 JA16-1 (10°F rise in 17.5 hours at the 80/63/80 rating point) |
| Controls and automation | Digital microprocessor control with pool, spa and cooling modes and digital diagnostics; free integrated Raymote Wi-Fi and fleet-monitoring dashboard; direct variable-speed pump control; dedicated valve-actuator connections; control of up to six devices; two auxiliary dry-contact ports. |
Parts
7 years
Labor
2 years
Heat exchanger
10 years
| Parts | 7 years |
|---|---|
| Labor | 2 years |
| Heat exchanger | Titanium tube 10 years parts, 2 years labor |
These are the manufacturer's published terms. Terms can depend on the installer, the dealer program and where the heater was bought, and they change without notice, so we confirm the exact term for your install on the written quote.
Titanium doesn't corrode in pool water, so it's the standard on quality heat pumps and the reason a heat pump can sit on a salt pool for years without exchanger trouble. It costs more, which is why it's rare on gas heaters, and the ETi 400 is the exception here.
See every material side by side on the comparison page, or read the Raypak fault codes guide for what the display is telling you.
Most to least forgiving of salt and unbalanced water.
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Every figure on this page comes from these manufacturer documents. We re-open each one and match the model number, capacity and efficiency before the date moves. How we verify.
| Document | Type | Last checked |
|---|---|---|
| Raypak — Crosswind V product page (model table, input rates, COP, sound level, voltage, maximum water flow)raypak.com | Product page | October 14, 2026 |
| Raypak — Crosswind V Product Submittal, 100-10009566 Rev 01, effective 08-20-26 (capacity and COP at all three AHRI test points, electrical, weights, dimensions, titanium exchanger, warranty summary)s3.amazonaws.com | Warranty terms | October 14, 2026 |
| Raypak — Crosswind V Installation & Operation Manual, 100-10000496 (clearances, flow and bypass thresholds, water chemistry limits, outside lockout temperature, variable-speed pump control)s3.amazonaws.com | Manual or guide | October 14, 2026 |
| Raypak — Pool Heater Limited Warranty, P/N 100-10000378 Rev. 09, effective 06-27-2025 (AVIA 3 years parts and labor; heat pumps 2 years labor / 7 years parts / 10 years titanium tube; authorized-dealer condition)s3.amazonaws.com | Warranty terms | October 14, 2026 |
Manufacturers revise terms without notice. Treat this page as a starting point and confirm the current terms before you buy. If something here is out of date, tell us and we'll fix it.
Parts: 7 years. Labor: 2 years. Heat exchanger: Titanium tube 10 years parts, 2 years labor. These are the manufacturer's terms as published; warranty terms change and can depend on the installer and the channel, so we confirm the exact term for your install on the written quote.
The TWPH-8550EHC08 is rated at 137,000 BTU/hr heating output. Heater size comes from your pool's surface area and the temperature rise you want, not from gallons, and the pump and plumbing have to deliver the flow the heater needs. Use our heater size calculator for a starting number, and we confirm it on site before quoting.
Yes. The TWPH-8550EHC08 has built-in Wi-Fi, and it also connects to automation through a relay.
Titanium doesn't corrode in pool water, so it's the standard on quality heat pumps and the reason a heat pump can sit on a salt pool for years without exchanger trouble. It costs more, which is why it's rare on gas heaters, and the ETi 400 is the exception here.
Every figure on this page comes from the manufacturer's own documents, listed under Sources with the date we last checked them. Manufacturers revise terms without notice, so treat the page as a starting point and confirm the current terms on your quote.
We quote, install and service Raypak heaters across Palm Beach and Broward, managed by us under our Florida Certified Pool/Spa Contractor license (CPC1461731). You get a free on-site sizing visit and one written price. Gas lines, new circuits and refrigerant work are done by licensed contractors we manage.
We call back within 30 minutes during business hours.
